| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.geometrymeasurement.app.extension;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.andami.plugins.Extension;

import org.gvsig.andami.ui.mdiManager.IWindow;

import org.gvsig.app.project.documents.view.gui.IView;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontext.layers.FLayers;

import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect;

import org.gvsig.geometrymeasurement.app.extension.utils.Operations;

/**

 * Andami extension to show AreaMeasurementExtension in the application.

 * 

 * @author gvSIG Team

 * @version $Id$

 */

public class AreaMeasurementExtension extends Extension {

    private static final Logger LOG = LoggerFactory.getLogger(AreaMeasurementExtension.class);

    private MapContext mapContext;

    private FLyrVect fLyrVect;

    public void initialize() {

        // Do nothing

    }

    @Override

    public void postInitialize() {

        super.postInitialize();      

    }

    public void execute(String actionCommand) {       

        Operations operations = new Operations();

        FeatureStore featureStore = fLyrVect.getFeatureStore();

        try {

            operations.addDoubleFieldFromOperation(featureStore, "AREA", "area");

        } catch (DataException e) {

           LOG.error("Not possible to create the area field", e);

           NotificationManager.addError(e);

        } catch (GeometryOperationNotSupportedException e) {

            LOG.error("Not possible to create the area field", e);

            NotificationManager.addError(e);

        } catch (GeometryOperationException e) {

            LOG.error("Not possible to create the area field", e);

            NotificationManager.addError(e);

        }  

    }  

    public boolean isEnabled() {

        return true;

    }

    public boolean isVisible() {

        IWindow window = PluginServices.getMDIManager().getActiveWindow();

        if (window == null){

            return false;

        }

        if (window instanceof IView){

            IView view = (IView) window;            

            FLayers layers = view.getMapControl().getMapContext().getLayers();

            FLayer[] activeLayers = layers.getActives();

            if (activeLayers.length == 1){

                if (activeLayers[0] instanceof FLyrVect){

                    fLyrVect = (FLyrVect) activeLayers[0];

                    try {

                        int type = fLyrVect.getShapeType();

                        if (Geometry.TYPES.CIRCLE == type

                            || Geometry.TYPES.ELLIPSE == type

                            || Geometry.TYPES.SURFACE == type

                            || Geometry.TYPES.MULTISURFACE == type){

                            return true;

                        }

                    } catch (ReadException e) {

                        LOG.error("Error reading the geometry type", e);

                        return false;

                    }

                }

            }

        }

        return false;

    }

}